or you could have had someone clone you some copies before you EV'd it. :P (MMEE)
well for roulette matches, both players tell the box #'s and amount of EV'd pokemon that are in them and choose randomly. For example, Box 3 slot 14. In that case, my opponent would have received a timid Bellyzard as their lead. You cannot change the order of pokes, and its all about integrity.